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107 wiersze
4.8 KiB
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<!-- received="Thu Nov 19 20:51:33 1998 PST" -->
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<!-- sent="Thu, 19 Nov 1998 23:57:34 -0500 (EST)" -->
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<!-- name="Christian Grigis" -->
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<!-- email="glove@earthling.net" -->
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<!-- subject="Re: Patch for Microtek ScanMaker X6 (microtek2 backend)" -->
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<!-- inreplyto="19981119233131.2879.qmail@aquila.muc.de" -->
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<title>sane-devel: Re: Patch for Microtek ScanMaker X6 (microtek2 backend)</title>
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<h1>Re: Patch for Microtek ScanMaker X6 (microtek2 backend)</h1>
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<b>Christian Grigis</b> (<a href="mailto:glove@earthling.net"><i>glove@earthling.net</i></a>)<br>
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<i>Thu, 19 Nov 1998 23:57:34 -0500 (EST)</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#175">[ date ]</a><a href="index.html#175">[ thread ]</a><a href="subject.html#175">[ subject ]</a><a href="author.html#175">[ author ]</a>
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<li> <b>Next message:</b> <a href="0176.html">Sebastian Erdmann: "Re: Patch for Microtek ScanMaker X6 (microtek2 backend)"</a>
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<li> <b>Previous message:</b> <a href="0174.html">becka@rz.uni-duesseldorf.de: "Re: forwarded message from Richard Stallman"</a>
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</ul>
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Hello,<br>
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<p>
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On Fri, 20 Nov 1998, Bernd Schroeder wrote:<br>
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<p>
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<i>> On Thu, Nov 19, 1998 at 03:53:49PM +0100, Sebastian Erdmann wrote:</i><br>
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<i>> > </i><br>
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<i>> > my Microtek Scanmaker X6 exhibits some strange behavior: After</i><br>
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<i>> > switching it on, colors (or greyscale tones) are "washed out" and</i><br>
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<i>> > horizontally unbalanced across the image. This occurs when using</i><br>
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<i>> > SANE 0.74 as well as SANE pre1.00. A simple workaround is to</i><br>
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<i>> > power-cycle the scanner (while keeping the computer running).</i><br>
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<i>> </i><br>
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<i>> This sounds indeed strange. Normally the scanner should be in reset state </i><br>
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<i>> after it is switched on. Or are the colors wrong if the scanner is switched</i><br>
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<i>> on before the system is booted (or the SCSI driver is loaded) ? Then</i><br>
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<i>> the SCSI driver sends one or more commands to the device, but these</i><br>
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<i>> commands should not affect the results of a scan.</i><br>
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<p>
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I just acquired a ScanMaker X6EL, and I noticed the same strange<br>
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behavior: the scanned image is OK after a powercycle, but the following<br>
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scans result in "weird" colors. <br>
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I have not had time to investigate the problem so far, but here is<br>
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some additional info: <br>
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<p>
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The problem seems to happen for 24-bit Color and 8-bit Gray modes.<br>
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36-bit Color and 12-bit Gray never result in a correct image (is that<br>
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because Gimp does not interpret those color schemes correctly?), and<br>
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LineArt is always correct. <br>
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By the way, 36-bit Color and 12-bit Gray modes seem to be handled<br>
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differently by scanimage and xscanimage: xscanimage does not complain, but<br>
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scanimage gives the following messages, apparently not understanding those<br>
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modes: <br>
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<p>
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scanimage -vvvvvv -l 40 -t 40 -x 80 -y 80 --mode 36 bit Color -d<br>
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microtek2:/dev/sg4 > image.pnm<br>
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<p>
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scanimage: scanning image of size 226x226 pixels at 48 bits/pixel<br>
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scanimage: acquiring RGB frame<br>
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scanimage: scanimage.c:813: scan_it: Assertion `parm.depth == 8' failed.<br>
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Abort<br>
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<p>
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<i>> scanimage -vvvvvv -l 40 -t 40 -x 80 -y 80 --mode 12 bit Grey -d</i><br>
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microtek2:/dev/sg4 > image.pnm<br>
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<p>
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scanimage: scanning image of size 226x226 pixels at 16 bits/pixel<br>
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scanimage: acquiring gray frame<br>
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scanimage: scanimage.c:815: scan_it: Assertion `parm.depth == 1 ||<br>
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parm.depth == 8' failed.<br>
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<p>
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<p>
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Finally, here is a mini-patch to have the scanner attributes<br>
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display correctly the X6EL model name:<br>
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<p>
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--- microtek2.c.back Thu Nov 19 22:36:26 1998<br>
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+++ microtek2.c Thu Nov 19 22:05:53 1998<br>
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@@ -2235,6 +2235,7 @@<br>
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case 0x92: fprintf(stderr, "E3+ or Vobis Highscan"); break;<br>
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case 0x93: fprintf(stderr, "ScanMaker 330"); break;<br>
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case 0x97: fprintf(stderr, "ScanMaker 636"); break;<br>
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+ case 0x98: fprintf(stderr, "ScanMaker X6EL"); break;<br>
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default: fprintf(stderr, "Unknown"); break;<br>
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}<br>
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fprintf(stderr, ")\n");<br>
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<p>
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<p>
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<p>
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Regards,<br>
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<p>
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-Christian<br>
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<p>
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<p>
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<pre>
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--
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Source code, list archive, and docs: <a href="http://www.mostang.com/sane/">http://www.mostang.com/sane/</a>
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To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@mostang.com">majordomo@mostang.com</a>
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</pre>
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<!-- body="end" -->
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0176.html">Sebastian Erdmann: "Re: Patch for Microtek ScanMaker X6 (microtek2 backend)"</a>
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|
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<li> <b>Previous message:</b> <a href="0174.html">becka@rz.uni-duesseldorf.de: "Re: forwarded message from Richard Stallman"</a>
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<!-- nextthread="start" -->
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</ul>
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